The monarch, who has mobility issues, will miss the opening of Parliament for the first time since 1963.
The Queen's main throne will remain empty in the House of Lords on Tuesday but the Imperial State Crown - traditionally worn by the monarch at the event - will still travel to Parliament.
Is this a glimpse of the future for such major royal events, with Prince Charles stepping in for the Queen at the State Opening of Parliament?Since then, Charles has taken on the main role in many set-piece royal occasions, including Remembrance Sunday, the Commonwealth Service and the Maundy Service.
Prince Charles and Prince William are opening Parliament in their roles as "counsellors of state", the four senior royals allowed to act on behalf of the monarch.
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